The Dark Energy Spectroscopic Instrument (DESI) is a massively multiplexed fiber-fed spectrograph that will make the next major advance in dark energy in the timeframe 2018-2022. On the Mayall telescope, DESI will obtain spectra and redshifts for at least 18 million emission-line galaxies, 4 million luminous red galaxies and 3 million quasi-stellar objects, in order to: probe the effects of dark energy on the expansion history using baryon acoustic oscillations (BAO), measure the gravitational growth history through redshift-space distortions, measure the sum of neutrino masses, and investigate the signatures of primordial inflation. The resulting 3-D galaxy maps at z<2 and Lyman-alpha forest at z>2 will make 1%-level measurements of the distance scale in 35 redshift bins, thus providing unprecedented constraints on cosmological models.
@article{arxiv.1308.0847,
title = {The DESI Experiment, a whitepaper for Snowmass 2013},
author = {Michael Levi and Chris Bebek and Timothy Beers and Robert Blum and Robert Cahn and Daniel Eisenstein and Brenna Flaugher and Klaus Honscheid and Richard Kron and Ofer Lahav and Patrick McDonald and Natalie Roe and David Schlegel and representing the DESI collaboration},
journal= {arXiv preprint arXiv:1308.0847},
year = {2013}
}
Comments
14 pages, 4 figures, a White Paper for Snowmass 2013